SIP

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SIP Primer from ESI

ESI shares insight on how resellers can help businesses navigate and implement SIP trunking.
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A SIP Primer

Courtesy of ESI, a primer on SIP trunking technology.

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SIP-itty doo da

Curious about SIP (Session Initiation Protocol)? Learn what is and how it works from this very detailed Avaya overview.

 

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